Unit 6, Lesson 3# Represent mixed numbers with units of tens, ones, and tenths with place value disks, on the number line, and in expanded form

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In this lesson, students work with place value disks and the number line to represent and identify decimal numbers with tenths as a unit. They use place value disks to rename groups of 10 tenths as ones. Then they record the value of each digit of a mixed number in fraction expanded form, followed by decimal expanded form - for example, 2 ones 4 tenths = 2 4/10 = (2 x 1) + (4 x 1/10) and 2.4 = (2 x 1) + (4 x 0.1). Finally, students model the value of decimal fractions within a mixed number by plotting decimal numbers on the number line.